sort of triangular-shaped, glass-fronted, bare as the Sahara. All the dogs (wolves and jackals) were very pacey.
The huge grey thing across the top of the photo is a covered highway which runs over the zoo! (See the linked thread below for some more on that).
See here for what else I saw:
http://www.zoochat.com/247/small-review-beijing-zoo-17-sept-337116/